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IH: Oiling & Lubrication - Sub-03F

57-76 Oil Pump - Individual Parts and Pics

Oil Check Valve

The oil pump check valve is in the front of the oil pump> It's a spring and a steel ball set up.
The red area in the pic below is the spring & ball sit.

1)

Check Ball

See also Check ball seat repair in the IH Oil Pump section of the Sportsterpedia.

Used until mid 1958, the tail of check fits inside the hollow center guide bore of the fitting. 2)
Note that there is no inner face seal surface on the fitting to further isolate the pressure switch port from the 'backside' of the check.

Check Spring

There were 3 springs used from 52-76. 3)
(52-56 also used a second valve- pressure relief).

  1. 52-E57: (26363-36)
  2. L57-E72: (26364-57)
    • Wire length: 1-15/64“ 4)
    • Wire O.D.: ≈ 0.0250” 5)
  3. L72-76 (26364-72)
    • Wire length: 1-7/16“ 6)
    • Wire O.D.: ≈ 0.0250” 7)

This is suppose to be a NOS 67 Pump Spring.
L = 1.215“ Wire Gauge = .024”

67 oil pump spring. 8)
52-E57 9) (L) L57-E72 - (R) L72-76 10) (Bottom) L57-E72 - (Top) L72-76 11)

Breather Gears

(Missing are the -'56 breather gear and long full profile woodruff scavenge drive key and snap-ring). 12)

Breather Gears 13) Some of amf's signature quality control.
These are 3 - 72 breather gears.14)
A closer view15)
The 2 different breather housings16)Feed Gear Sets17)More often than not the solid pin was a slipfit in cross hole.18)
On to the bodies. The 2nd text is “26217-56a L58-e62”19)
The 4 different scavenge gear sets.
Lined up from early in foreground to later in background.
This is to show the height progression.20)
Top view of all 4 sets.21)A closer view of the height changes.22)


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